Rates of interspecies introgression between H. melpomene, H. heurippa, and H. timareta.

Migration rates were inferred using IM, with estimated values converted into effective units of population migration rate per generation assuming 10 generations per year. m1 refers to migration from H. timareta to H. melpomene and m2 refers to the migration from H. melpomene to H. timareta. The 2Nm values are the effective number of gene migrations received by a population per generation. Values of 2Nm greater than or equal to one can prevent populations from accumulating divergence [37].Values of 2Nm in migrants per generation.